4. The Hawaii Company purchases a machine on 1/1/21. Details include: $50,000 $ 10,000 Cost Salvage value Estimated life Estimated units to be provided 10 years 100,000 Assume units-of-production depreciation. Actual units produced were: Year 2021 2022 2023 2024 Units 20,000 15,000 10,000 8,000 Indicate the following amounts: a) 2024 Depreciation Expense $4,000 $4,000 $3,200 $4,000 $3,200 12/31/24 Accumulated Depreciation $53,000 $18,000 $21,200 $4,000 $3,200